Casing-cutter.



M. J. MILZ.

GASING GUTTER.

- yAPPLICATION FILED JAN. 22, 1914. 1,107,822, Patented Aug. 18, 1914.

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MAX J., MILZ, 0F TAFT, CALIFORNIA.

CASING-CUTTER.

Specification of Letters Patent.

Application filed January 22, 1914. Serial No. 813,734.

To all w/om it may concern.' l

Be it known that I, MAX J. MILz, 'a citizen of Austria, residing atTaft, in the countv of Kern, State of California, .have invented certainnew and useful Improvements in CasingCutters; and I do hereby declarethe following to be a full, clear, and exact description of theinventiomsuch as will enable others skilled in the art to which itappertains to make and use the same.

The present invention is directed to improvements in casing cutters, andhas for its object to so construct a device of this cha racter that thesame can be lowered in a wel] casing and manipulated to cut the casingat the desired point. i i

A. further object'- of the invention is to provide a casing cutter soconstructed that the cutting disks can be set with theirperipheriesdisposed inwardly of the bounding surface of the cutter for insertionin' the casing, after which they may be moved outwardly during thereciprocation of the rod. With these and other objects in view, thisinvention resides in the novel features of construction, formation,combination and arrangement of parts to be hereinafter more -fullydescribed, claimed and illustrated in the accompanying drawing,.linwhich Figure l is a side elevation of the device when being lowered inthe casing. Fig. 2 is a similar view,showing the device in its 'cuttingposition in the casing. Fig. 3 is a sectional View taken on a verticalplane. Fig. 4 is a detail perspective view of one of the supportingblocks for the cutting disks. Fig. 5 isa sectional view on line 5 5 ofFig. 1. Fig. 6 is a similar view ou line (3-6 of Fig. 2. Fig. 7 is asimilar view on line Tm? of Fig. 2. Fig. 8 is a similar view on line S-8of Fig. l.

Referring to the drawing, the numeral l designates the body of thecutter. the same consisting of upper and lower sections :2 and 3.respectivelv. the lower section being swivelly connected to the uppersection i2 b v the head 4, as clearly shown in Fig. 3 of the drawing.Passing through the sections 2 and 3 is a rod the lower end of which isprovided with a head 6. Isaid 4head having oneof its sides provided withan inclined shoulder 7. the purpose of which will appear later. Theupper end of the rod is provided with the threaded extension S forengagement by the usual drill rod (not is a collar 9 from which dependIlingers 1t) which slidably engage the slotshll, formed in thesection 2.The fingers 10 are provided with grooves l2, said grooves beingslightly' inclined and are adapted'to be engagedfby the ribs 13 formedVupon the-blocks 14 'which' revolubly .support the cutting diskshlr Itwill be noted that as thefingers 1Qy move downwardly during theoperation `of the tool the blocks 1l will be gradually moved outwardlyso that the cutting disks will sever the casing 1G upon continuedrotation of the section 2 during which time the section 3 remainsstationary in the casing. The blocks 14: are pivotally mounted in therecesses 17 formed in the upper end of the section 2,

and arecaused to return to their inoperative position by the coilsprings 18, which have, one of their ends connected to thejblocks andtheir other ends fixed in the socketslS also formed in the section 2an`das clearly shown in Figi of the drawing.

The rod 5 is provided with a 4longitudirial groove 20 which is slidablyengaged by ithe' rib 21 formed in the bore of the section 3,

said rib servingr to prevent accidental rota? tionA ofthe section3,.liut permitting' the rod 5 to freely reciprocate during the cuttingoperation. The rod 5is also provided .with a spiral groove Q2 which isslidably engaged by the rib Q3 formed in the bore of the secltion 2, thepitch of said groovebeing such that upon downstroke of the rod about.five eighths of a revolution of the.l section 2 will be obtained. lt isalso obviousthat upon the upstrokeof the rod 5 about five-eighths of arevolution of the section l-will be obr tained. Thus it will be seenthat the section 2 will rotate alternately hack and forth, and as thecutting disks 15 are supported by said section, the same will cut duringthe rotation of the section in either direction.

In Fig. 1 of the drawing there is shown a block 24. which is providedWith a serrated face said block being also provided with a beveled ribQGWhich yis. del'v signedto engage thel inclined shoulder 7 formed inthe head (i so that said block when moving downwardly will be movedlaterally, thus moving from under the pro- Iiection 2T carried by thelower end of the section 3. and when this occurs the section 3 movingdownwardly will cause the plates 28 to bite into the interior surface ofthe casing. owing to the fact that the lower end shown). Slidablymounted on the rod 5 l ofthe section and inner faces of the platesPatented Aug. 18, 1914.

arev inclined. Whentlre plates' 28-are en-.

gaged with the interior of the casing the section 3 is ,held bothagainst "vertical andv rotary movement.

lWhen the tool is lowered in the welltfandV4 the parts are in theposition as shown in jerk upwardly being imparted to the rod 5,

` ofthelhead 6. rlfhusvitwill be seen that en dsofthe plates28. v,

whereupon. said block4 will ,movadownwardly 'and laterally'fso that theprojection 2 will 'disengage thegsame, thus causing .the plateisu28'tomove outwardly and grip l.

the casing. lFixedto the section 3, and diametricall'y oppostetheprojection 27 isthe upper end ci' the Vbowed spring 29, the lower endof'whichhas" fixed thereto a block 3,()y

'which' when the'4 tool is beinglowered in the casingrests in the groove31 formed 1n the hea-d f6, but, as soon as the plates 28 have grippedthe casingthe block 30will move-inwardlyfso that when thev head 6 ismoved upwardly, and at the time when itis j desired to remove the tool:from thecasing, said -loloclr will engage the upperv surface uponthe-tool being moved upwardly the plates28 will move inwardly so as todis,- 'engage the innersurface of the casing, after which the tool canbe'- easily removed. The bowed spring 29`V also serves to'yieldablyforce the-teethof the'block 24 into engagement with thefcas'ing so thatwhen a jerk is imparted to the tool the teeth of said block will gripthe casing, thus locking the section 3, in ,the casing.4 Slidablyconnected toithe lower) ends of the plates 28 are wedge members 32,which have their upper surfaces Iinclined, as at 33,or enga 'ng theinclined surfaces 34: yformed upon: t e lower From the foregoingdescription itwill be seen that when the section 3 has been'loclred `infthe casing at the proper position reciprocatory movement is imparted ,tothe rod 5,' whereupon thesection 2 will be compolledl to rotatealternately back Iand "forth, Ithu,"causingthe cuttingdis'ks 15 to severthelcasng'. A, cushioning spr1ngx35. ,encicles against the upper'surface offthfecollar 9 and, its other endengaged bythe disk 36.

This lspring serves the rod 5 ,andjhasone end. bearing A toreceive theimpact fof niorea The casing cutter herein described is espe-l ciallydesigned for operation by a cable `through which the device isreciprocated and lowered.

What -is A'claimed is 1. A casing cutter comprising upper and lowersections, a rod passable throu h the sections, cuttingt disks supportedby t e upper section, means carriedibythe rod for partially rotating theupper section iirst in one direction iand then in the other direction,and means for holding the lower ysection stationary in thecasing.

2. A casing cutter comprising upper and lower sections, a rod passablethrough lthe sections, a collar carried by the rod, fingers dependingfrom the collar, said ingers hav ing inclined grooves formed therein,blocks pivotally supported bythe upper section, cutting disksl carriedVby the blocks, said blocks having ribsfor slidably engaging saidgrooves, grooves formed Iinl the upper section for slidabllyCreceivingthe fingers, said blocks beingl adapted to lmove. outwardlykgradually as the nungers move downwardly` in saidof the rod, aprojection carried by the lower section, wedge platesslidably'connectedto the lower section, a block slidably mounted uponsaid head for engaging the projection, said block being adapted toengage the casing and adapted for movement downwardly .and laterally todisengage the projection; to releasethe lower section which when mov ingdownwardly `'will move the plates Afoute wardly to lock the lowersection 'tothecasf ing, and means carried lby the lrod for alter,-nately rotating the upper section back and forth during thereciprocation of said rod in the upper and lowerv section, 4

lin- ,testiinony whereof, ll affix my .signature, in the presence ofltwo witnesses.

MAX gil'. Mil-LZ. Witnesses:

WHITTEMORE, C.. Broni/ovv,

